problem with email notification since update to redmine 5.1.2

Hello,
we updated to redmine 5.1.2 some weeks ago and since this update we have tremendous problems with email notification.
In many cases no emails are sent even if users are set as a Watcher. In other cases the emails are sent. Until now we didn't see any regularity.
In former versions of redmine email notification was working without any problem.

Any ideas?

Many thanks in advance!
Gerhard

Replies (2)

RE: problem with email notification since update to redmine 5.1.2 - Added by Holger Just 10 days ago

Email notifications are performed asynchronously in the background. In the default configuration, these jobs run as separate threads in the main web application server processes. This can cause issues if these processes die for any reason (e.g. timeouts).

Because of that, we recommend to use a external job queue, such as sidekiq. See SidekiqConfiguration for configuration details.

If that does not help, there are many reasons why mails could not be sent, including:

An administrator may have change the global notification options to exclude some types of notifications.
Users may have updated their notification settings on their My Account page.
Your mail infrastructure may be overloaded or is rejecting (some) genuine mails.
Or a lot of other potential issues...

Please check the logs of Redmine as well as those of your mailserver for more information. With just the sparse details you have given here, it's almost impossible to find the root-cause of your issue unfortunately.

RE: problem with email notification since update to redmine 5.1.2 - Added by Gerhard . 9 days ago

Hello Holger,
many thanks for your advices, we'll give sidekiq a try.

regards
Gerhard

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